Waga Yoshitada was an individual during the Sengoku period.
In 1590, Toyotomi Hideyoshi raised an army for the Conquest of Odawara. Landowners and daimyō from the Kantō and Ouu regions deployed one after another to Odawara to join the Toyotomi army, but Yoshitada, along with Yūki Yoshichika, Ishikawa Akimitsu, Esashi Shigetsune, Kasai Harunobu, Ōsaki Yoshitaka, and Hienuki Hirotada (Shigetsuna), refused to join. As a result, they witnessed their territories seized and were expelled from their castles during the subsequent Oushū Retribution.
After the ouster of the Waga clan from their base at Toyagasaki Castle (later known as Hanamaki Castle), Asano Nagamasa (a magistrate of Hideyoshi) entered and ordered commanders from the Toyotomi sent to Oushū to advance with their forces to the environs of Hiraizumi to suppress several castles in the territory of the Waga clan. Retainers of Nagamasa were stationed on behalf of the Toyotomi and progress was made toward establishing a new system. After conducting a land survey, district governors and officials remained while the Oushū army withdrew.
Former retainers of fallen daimyō from the Ōsaki, the Kasai, and the Kashiyama from the Iwasa District along with local peasants harbored grievances toward the Toyotomi over the land surveys. Soon after the withdrawal of the Oushū army, in the tenth month, these groups launched uprisings across their territories, killed a bushō sent by Hideyoshi named Kimura Yoshikiyo, and wielded their power. In tandem with these events known as the Kasai-Ōsaki Uprising, Yoshitada and Hienuki Hirotada launched their own rebellions in the Waga and Hienuki districts of Mutsu, known as the Waga-Hienuki Uprising. Later that year, these uprisings were suppressed by the Toyotomi army. Yoshitada attempted to flee, but was captured and killed by locals in a custom known as ochimushagari by which fallen bushō were targeted and their possessions taken by locals outside the bounds of any laws.